Window cleaner



y 1939- o. MOLLER 2,158,141

WINDOW CLEANER Filed Sept. 22, 1936 2 Sheets-Sheet l I6 I4\ 75 a; l4

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ATTORN EYS 0. MOLLER WINDOW CLEANER May 16, 1939.

Filed Sept. 22, 1936 2 Sheets-Sheet 2 INVENTOR OTTO MOL L E 2 4 44m ATTORNEYS Patented May 16, 1939 UNITED STATES PATENT ormee 1 Claim.

The subject of the invention is a new and improved device for the mechanical cleaning of the exterior surfaces of the panes of sliding windows.

The cleaning of the outer sides of sliding Windows is known as one of the most dangerous occupations. Therefore the object of the present invention is to provide a mechanically operated device, adapted to do such window cleaning from the inside of a room, and in absolutely safe and easy manner. In order to carry out this task I constructed a device, which consists essentially of an L-shaped framework, the lower horizontal part of which reaches into the room and is clamped fast between the lower ends of the stiles of the stationary frame of the window opening or to the sill of that window frame, whereas the vertical part of my device extends parallel to the outer surface of the window panes, and carries an up and down slidable carriage with suitable tools, the vertical reciprocating movement of which on the panes effects the cleaning of the latter. An endless rope is fixed to that carriage and trained along both parts of the L-shaped framework of the cleaning device and round a cranked disk at the end of the horizontal part of the device within the room, so that by a simple crank-turning movement of this disk the window panes will be wiped over by the cleaning tools of the said carriage.

In order to make perfectly clear the invention and the construction devised to carry it out, I have shown in the drawings two embodiments of same, whereby the Figures 1 and 2 are a side elevational view and a rear elevational view respectively of the first embodiment of my new and improved window cleaning device; Figure 3 is a plan view on the lower part of the device; Figure 4 shows in a perspective view the lower half of a modification or second embodiment of the new device.

Referring now in detail to the drawings in the illustration of the first example the L-shaped framework of the device consists essentially of a pair of spaced apart upright posts II, which at several places of their height are joined by braces or shafts I2 and are mounted at their bottom on the one end of the horizontal base plate I3. A carriage I4 is mounted on the posts, so as to be slidable along them up and down, and the extensible front arms I 5 of this carriage are adapted to hold a scraper sheet l6 of rubber or some other window cleaning tools. The shaft l 2 which braces the upper ends of the posts ll, carries a grooved pulley II as the upper turning point for the rope I8, which reciprocates the carriage I4 up and down along the post, the rope being fixed to the carriage at point H8. Another shaft 12, which braces the lower ends of the posts, carries a pair of grooved pulleys l9, around which the rope line I8 is trained to go along to the front end 5 of the horizontal part of the L-shaped framework, where it spans round a disk wheel 20. The disk wheel may be rotated by the means of a thumb stud 2|. Therefore a rotation or oscillation of the disk wheel 20 by the crank forming 1o stud 2| shifts the rope line I8 and consequently it reciprocates the carriage M in a vertical path, because the rope line I8 is fixed at the point H8 of the carriage M.

The fixing of the L-shaped framework within 15 a Window opening in a position suitable for the cleaning of the window panes is effected by the following means: The base plate l3 serves as a .guideway for a slide 22, which is fixed at a suitable place on the base plate by plucking some 20 setting bolts or screws 23 into holes 24 provided in the longitudinal axis of the base plate l3. The upper part of the slide 22 serves as the housing 25 for two lengthwise adjustable arms 26 and for the setting screws 21, which fix the arms 5 in the right adjustment. At the outer ends of the arms are flaps or shoes 28, which are braced against the stiles of the window opening insuch adjustment, that the scraper sheet l6 or other wiper tool touches the window pane to be cleaned. 30 In order to secure always good contact between the scraper or wiper and the window pane, no matter at which height the carriage may be, the posts l l can be swung round their feet ends and are settled in positions exactly parallel to the 35 panes, by lengthening or shortening somewhat the extensible rearward braces 30, 30 of the posts II.

The embodiment of the invention shown in the Figure 4 is similar to that of the first example, 40 with only a few differences in constructional details: The base plate for the posts 3| and their rearward braces 32 is a rectangular frame 33, which carries at its front end a box 34, containing within it a pulley disk, which shifts the pul- 46 ley rope 35 when being turned or oscillated by the outer handle 36. The longer sides of the rectangular frame 33 have two pairs of slots 36,

31, through which pass the fastening screw bolts or handles 38, 39 of crosswise to the frame 33 50 situated positioning means for the frame. These positioning means are a block 40 of rectangular cross-section, and a' preferably hollowed ledge 4!. In order to fix the whole device in the correct position, the block 40 and the ledge 4| are 55 set fast against the two sides of the (not shown) crossbeam of the window sill, and. they are fixed to it by means of the clamping handles 38, 39. The construction of other parts such as the carriage reciprocating along the posts 3| and that of the window cleaning tools on the carriage are not shown in this figure, because they may be like those, which are shown and described in the first examples.

It is to be understood that the invention is not limitedto the shown and described constructions, but it may be carried out in otherways, whenever different conditions make such changes desirable.

I claim:

In a window cleaning device the combination with a frame having a horizontal base adapted to extend through a window opening into a room and having an upright portion for supporting the window cleaning tool and a pivot rod interconnecting said base and said upright portion; of a tool reciprocating mechanism comprising a pair of pulleys supported on said pivot rod, a

second pulley supported at the upper end of said upright frame portion, a rotatable disc on said base and a belt about said disc and said pulleys having its ends connected to said window cleaning tool.

OTTO -MOLLER. 

